Experience has shown me that IntelliSense is reliable, up to a point. After that it's just 'moody'.
– Radu GheorghiuFeb 6 '17 at 15:20

1

Have you installed any third-party extensions like SQL Complete? I ask for two reasons - one, that it may have conflicted and caused SSMS to get a little funky, or two, if you haven't, then you may want to consider it as an alternative to the native intellisense.
– Joe EnosFeb 6 '17 at 15:22

@JoeEnos Thank you very much. This really solved my problem and works very well. It is fast and responsive. I really appreciate your help.
– AdamFeb 6 '17 at 15:43